Add "See Also: missing" to help('exists')?
Might it be feasible to add, "See Also: missing" to the help
page for "exists"?
Currently, one can spend hours studying the help page for
"exists" without getting a clue to the answer to the post copied below.
Thanks,
Spencer
On 5/14/2011 3:30 AM, David Winsemius wrote:
On May 14, 2011, at 3:30 AM, utkarshsinghal wrote:
Hi all, I want to define a function such that one of its argument if passed do one thing and if not passed do the second thing.
?missing
So basically, I have to check whether the argument is passed or not inside the function. I am trying to use 'exists' function to do this.
f = function(a,b){exists("b")}
f(a=3, b=4)
[1] TRUE This is working as expected. But if I do the following:
f(a=3)
[1] TRUE Can anybody explain why this function is returning TRUE here. -- Many thanks, Utkarsh
______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
David Winsemius, MD West Hartford, CT
______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.